87025428442738 has 4 divisors (see below), whose sum is σ = 130538142664110. Its totient is φ = 43512714221368.

The previous prime is 87025428442669. The next prime is 87025428442787. The reversal of 87025428442738 is 83724482452078.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81367562037609 + 5657866405129 = 9020397^2 + 2378627^2 .

It is a super-2 number, since 2×87025428442738² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87025428442738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21756357110683 + ... + 21756357110686.

Almost surely, 2^{87025428442738} is an apocalyptic number.

87025428442738 is a deficient number, since it is larger than the sum of its proper divisors (43512714221372).

87025428442738 is a wasteful number, since it uses less digits than its factorization.

87025428442738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43512714221371.

The product of its (nonzero) digits is 192675840, while the sum is 64.

The spelling of 87025428442738 in words is "eighty-seven trillion, twenty-five billion, four hundred twenty-eight million, four hundred forty-two thousand, seven hundred thirty-eight".